Apparatus for utilizing blocks of carbon dioxide ice



H. BuRslTzKY Fild July 26, 1935 Feb. 23, 1937.

APPARATUS FOR UTILIZING BLOCKS 0F CARBON DIOXIQE ICE the top is open 4such as a block of carbon dioxide ice Patente-dl Feb. 23, '1937' UNITED-STATES IPxrlzN'l ,OFFICEl APPARATUS FOR UTILIZIG 4BLOCKS 0F CARBON DIOXIDE ICE Hans rsitzky, Strausberg, near Berlin, Germany Application July 26, *1935, Serial No. In Germany July 31, 1934 s claims. v (c1. sz-91.5)

My invention relates to improvementsin the method 'of and apparatus for utilizing blocks of carbon dioxide ice dry lce) o'r other solid material as aA refrigerant in containers, which are especially designed for storage Vor transport, and

which are particularly adapted to handle the refrigerant without fear of breakage. l

To clearly lcomprehend `the purpose of the in` vention; it is desired to' point outthat the'known containers vfor a refrigerant include what is genA erally termed a vacuum vessel composedv of spaced solids; e. g. yblocks ofcarbon dioxide'v ice, because the latter come in contact with the'glass WallsI and the, glass to breakduring the loading operationor while the container is intransit. f

With theforegoing in mind itis an object of. the

presentwinvention to `utilize lthe .ordinary 'glass vacuum vessel in a container comprising an out- .side yprotecting shell containing suitable cushionmilk, beer, water or the like, which may be brought tothe proper temperature by the proximity of the refrigerant carried in the container.

I accomplish the purposes of my invention by means of an apparatus one embodiment of which is described in ,the following specification and illustratively vexemplied in the accompanying drawing, in which the view is a substantially longitudinal section'of the apparatus by means of which the present invention is put into practice.

Referring to the drawing, I denotes a vacuum .vessel consisting of spaced glass -walls, the air having been exhausted from the space between The bottom of the vessel is closed and togive access to the interior. Suspended within the vacuum vessel I and spaced therefrom along the side and the bottom is an inner compartment or container generally indicated by 20, adapted to contain the refrigerant 2, (dry ice) or the material to be chilled or preserved. On its exterior the vessel I is protected by an outer the Walls.

platform 4.

shell or box 3, which also is used asa carrier or crate for the vessel and its inner containerll).

In practice the shell 3 is spaced from the outer wall of rthe vessel I and comprises a continuous upright wall, a bottom plate. 4 and a marginal 'I'he top of the platform 4 is provided With'a plurality of vsligh't depressions to accommodate or form seats for an equal'nurnber of innated balls s, each of which contacts the Wall of the shell 3an`d the bottom or closed end vof the vacuum vessel I, which thus'r'eceives its `prefervto resilient support at its lower end. I

arrange the'balls 5 closely together. 'A^rubber cupz8'mountedcentrally of the bottoml 4 loosely yembraces 'a projection or point 1 formed in the glass'of the outer wall of the vessel \I to protect said point.l *Further cushioning mea-ns in' the form of la tube 6'is utilized-about the upper por-1 i tion of the vessel, the tube 6 being inflated to the `necessary'degree and disposed between the vessel andadjacent wallof the. shell13.V f v The inner-compartment 20 comprises preferably a plurality of depending -,spaced rods I of 1 iron or other suitable metal-faced on the inside with wood I5. The rods are attached at their upper ends in a wood ring I I closing the upper end of the shell 3 and at their lower ends are bent or turned inwardly at right angles to form rests I2 upon which the bottom I3 of the container is supported'. The bottom I3 is provided with holes or apertures I4 and is preferably made of wood. The seal for the open end of the container is a plug i6 consisting of nettle-cloth tightly lled with wadding or of some other suitable material. The annular space between the compartment 20 closely embraces the upper end of the glass vessel I. A plate I8 is used to cover the compartment 20. As the perforated bottom I3 is suspended to l the ring II fastened to the shell 3 the load of an ice block 2 having a weight of 20 to 28 lbs. is taken l i up by the shell 3 and the ice block does not come in contact with the glass walls of the vessel I; so that a breakage of the latter is avoided.

ing a plurality of coils disposed below the perfo-V rated bottom I3 of the compartment 20 and-the inlet and outlet ends I9 projected through the ring plug I1 and wood ring II to be connected either with a fluid line of a reservoir (not shown) or with a refrigerating machine (also not shown). From said reservoir the liquid to be chilled, i. e. milk, beer or the like, flows through .the coil 9 by means of the available head andwill be chilled by the ice block 2. If the coil 9 is connected with the refrigerating machine, a gaseous or liquid cooling medium, such as brine, alcohol, diluted 'glycerine, etc., ows through the coil 9 and is the ice block 2. This cooling medium mechanical cyclic process by means of a centrifugal pump (not shown) interposed in the conduit and flows through a second coil in the refrigerating machine, where it chills nutritive materials or the like surrounded by said second coil. To control able regulating means, such as valves or automatically acting devices. may be installed in the lines carrying the liquid or the cooling medium.

A plurality of cooling devices of the described type may be connected in series and/or in par.-

oor preserve stationary allel, if desired, and like connections may be pro vided for the refrigerating machines, if there are several in use.

When the in ention is used as a means to chill articles, such as ice cream or other food products or even a block of carbon dioxide ice or snow, the coil 9 may be removed and a'quantity of carbon dioxide ice is placed as a refrigerant outside of the innerl compartment 2li on the bottom of the vacuum I in the space 32, while the articles to be chilled or pren` served are placed on the perforated bottom I3 of the compartment. Thus a perfect safety and products or blocks sured and a breakage of the glass walls of the vessel I by said articles is avoided.

I have shown a preferred embodiment of my invention but it is clearl that numerous changes the cooling degree suit- -attached to said shell, by the ring and disposed inside the vessel and a and omissions can be made without departing from the spirit.

Having now described my invention and the nature in which the same operates, what I claim and desire to secure by Letters Patent is:

1. A cooling device comprising an outside shell,

a double wall vacuum vessel said shell. and an inner compartment for said vessel comprisingI a ring arranged over the vessel and attached to said shell, depending rods carried by the ring and disposed'inside'the vessel, and a perforated bottom member supported on the inner ends of the rods. l

2. A cooling device, as claimed in claim 1,. in which the said inner ends of the rods are bent inwardly at right angles and the said bottom rests loosely upon'said ends.

3. A cooling device comprisingan outside shell, a double wall vacuum vessel mounted in said shell, a series of inflated balls arranged on the bottom of said shell to support said vessel and an inated tube arranged between vessel and shell to hold and protect said vessel, and an inner compartment for said vessel.

4. A cooling device comprising an inner compartment, an 'outside shell, a vacuum vessel resiliently nested between the walls of the compartment and shell, and a cooling'coil disposed between the wall of the compartment and the inner wall of said vessel.

5. A cooling device comprising an outside shell, a double wall `vacuum'vessel resiliently nested in said shell.' an inner compartment for said vessel comprising a ring arranged over the vessel and depending rods carried resiliently nested in perforated bottom member supported on the inner ends of the rods, and a cooling coil disposed between the wall of the compartment and the inner wall of said vessel and mounted on the outside of said rods.

the upper part of the 

